<% content_for :css do %>
  <%= stylesheet_link_tag 'orders_search' %>
<% end %>
<div id="search_form">
  <%= form_tag orders_url,
        :method => :get do %>
  <%= text_field_tag :key_words, '', :class => :search, :onfocus => 'select()' %>
  <%= submit_tag '搜索订单', :class => :bb %>
  <% end %>
</div>